package com.example.demo.congfig;

import com.example.demo.common.AppVariable;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if (session != null && session.getAttribute(AppVariable.USER_SESSION_KEY) != null) {
            // 用户已登录
            System.out.println("登录的用户：" + session.getAttribute(AppVariable.USER_SESSION_KEY));
            return true;
        }

        response.sendRedirect("/login.html");
        return false;
    }
}
